Snapped spindle

[Ajax Bay]

horseshoe crab blood
agarwood
tritium
ZOLGENSMA® (onasemnogene abeparvovec-xioi)
saffron
diamonds
Deathstalker Scorpion venom
painite
Californium
antimatter
Hollowtech2 chainset bargain at £399, and fit for purpose. You are overpaying for 'your' chainset @silva or using a usurious exchange rate.

Features​

• A top-of-the-range 12-speed chainset offering the optimum balance of low weight and rigidity
• HollowTech II hollow aluminium crank arms increase stiffness and strength while reducing mass
• Hollow outer chainring, grants improvements in rigidity for better shifting while saving weight
• The chainring teeth are optimised for better efficiency when used with a 12-speed chain
• HollowTech II 24mm diameter spindle increases stiffness and efficiency
• The spindle is designed to work seamlessly with HollowTech II bottom brackets (available separately)
• Manufacturer claimed weight: 714 grams (175mm length, 54-40T), 692 grams (175mm length, 52-36T), 685 grams (175mm length, 50-34T)

 

[silva]

Zola ran barefoot because that was how she had run in South Africa due to being too poor to afford running shoes.

I said, and you quoted:
"If you don't believe, give Zola Budd logger boots and see what it gives..."
... I didn't ask you for the How and the Why of no shoes.
Feel Free to Donate your Zola a Free Pair of Logger Boots.
Free, Zero Euro.
Then, compare the secs Zola ran the 100 metres:
- Bare Foot
and
- With logger boots Sponsored by raleighnut.
That is where Cheating in body sports racing is about: getting an advantage NOT by body condition/technique improvement, but by an external parameter, alike making bicycles lighter, in this topic specifically: axle, cranks.
When arriving at the point everybody has the lighter mounted, the cheating ofcourse ceases, leading to the creation of a next cheat, and the story restarts.
Apparantly, as proved, thereby going so far that Safety got compromised, in all products sections and parts - crank, spider, pincher bolts area, spindle, crack crack crack crack.

 

[Dogtrousers]

Forms of cheating:
Practicing beforehand. A true winner relies on their innate superiority.
Knowing in advance when and where the competition is. A true winner relies entirely on happenstance.
Trying. A true winner wins effortlessly.

Specifically in bicycle racing the worst forms of cheating are: bearings, lubricants and wheels.

 

[EckyH]

horseshoe crab blood
[...]
antimatter

The Nowhere Man couldn't combine that better.

Hollowtech2 chainset bargain £ per gramme, and fit for purpose

Neither hammer nor chisel are in the box content. So it isn't a bargain at all!

E.

 

[raleighnut]

I said, and you quoted:
"If you don't believe, give Zola Budd logger boots and see what it gives..."
... I didn't ask you for the How and the Why of no shoes.
Feel Free to Donate your Zola a Free Pair of Logger Boots.
Free, Zero Euro.
Then, compare the secs Zola ran the 100 metres:
- Bare Foot
and
- With logger boots Sponsored by raleighnut.
That is where Cheating in body sports racing is about: getting an advantage NOT by body condition/technique improvement, but by an external parameter, alike making bicycles lighter, in this topic specifically: axle, cranks.
When arriving at the point everybody has the lighter mounted, the cheating ofcourse ceases, leading to the creation of a next cheat, and the story restarts.
Apparantly, as proved, thereby going so far that Safety got compromised, in all products sections and parts - crank, spider, pincher bolts area, spindle, crack crack crack crack.

• Zola Budd ran middle to long distance, 3,000 metres was the shortest race she ran at the Olympics.
• Why would anyone run in 'Logger Boots' unless a Bear was chasing them.
• I've never even seen a 'euro' let alone had any........................We deal in Pounds Sterling here, none of this continental 'funny money' for us.

 

[silva]

Forms of cheating:
Practicing beforehand. A true winner relies on their innate superiority.
Knowing in advance when and where the competition is. A true winner relies entirely on happenstance.
Trying. A true winner wins effortlessly.

Specifically in bicycle racing the worst forms of cheating are: bearings, lubricants and wheels.

According to the data in the publishment by:

... practiced 10 years - even longer than Shimano's 7 year itself, before admitting to Consumers that they were practising.
... worldwide 3 million Test Rabbits, with in the US alone over 4000 that Walked, 1 Leg Limped, or made an emergency call to be picked up.
Then they discovered their Test Rabbit Statute.
It's like in Watership Down by Richard Adams, the farmer that put here and there tasty leafs in order to make rabbits dig their holes on his land.
Where he then put some traps to now and then have 1 on his dish.
So now and then, a rabbit disappeared.
The boss of the colony, knew it, but liked the tasty leafs served to him, so he outlawed the words "where is".
That's what Shimano and US CPSC did.
It also lasted until too many started to ask too many questions.

 

[Webbo2]

According to the data in the publishment by:
View attachment 803772
... practiced 10 years - even longer than Shimano's 7 year itself, before admitting to Consumers that they were practising.
... worldwide 3 million Test Rabbits, with in the US alone over 4000 that Walked, 1 Leg Limped, or made an emergency call to be picked up.
Then they discovered their Test Rabbit Statute.
It's like in Watership Down by Richard Adams, the farmer that put here and there tasty leafs in order to make rabbits dig their holes on his land.
Where he then put some traps to now and then have 1 on his dish.
So now and then, a rabbit disappeared.
The boss of the colony, knew it, but liked the tasty leafs served to him, so he outlawed the words "where is".
That's what Shimano and US CPSC did.
It also lasted until too many started to ask too many questions.

You do know Watership down is fiction as rabbits can’t talk in real life.

 

[silva]

• Zola Budd ran middle to long distance, 3,000 metres was the shortest race she ran at the Olympics.
• Why would anyone run in 'Logger Boots' unless a Bear was chasing them.
• I've never even seen a 'euro' let alone had any........................We deal in Pounds Sterling here, none of this continental 'funny money' for us.

I used your own Zola Budd referral to illustrate you the should-be Captain Obvious point that reducing weight of gear on body makes it easier to win, whatever distance, since you made that another irrelevant point here.
Shimano's Hollow Technology is reducing weight of bicycle, to make it its rider easier to win.
That you needed to be told this, THAT was NOT obvious!

 

[silva]

You do know Watership down is fiction as rabbits can’t talk in real life.

https://www.merriam-webster.com/dictionary/analogy
You do know bicycle weight cheating is a fictional physical sports win?

You're The Best Lance!
... was also a fictional, despite even physical, win.
... because the win was due to doping instead of training.

But that wasn't the point here in this topic, the point is that they went that far in it, that they put Safety at risk.
That's a No, no?

And the reason why: https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472
https://weightweenies.starbike.com/forum/viewtopic.php?t=176295&start=60

...
Shimano is using, by 2024 standards, and crank load, AND price, a cheap forging technique, glueing parts. That is no longer suitable to drivetrain loads, or BBs so stiff that the cranks take unprecedented loads.
...
Point is, Shimano's alloy would not pass the Auto Light Alloy testing standards. And if you can buy a 10,000 ton pressed Rays rim for 1000-1500$, 18+ lbs, (which could amount to 15-18 DA cranks) and you spend 700-1000$ for a 700 g Dura Ace Hollowtech crank, something does not add up. If Shimano was to retool and adopt proper cold forging techniques, they could make their cranks lighter, stronger, and glue/bond free. They are stuck in the past with 2.8 million and mounting recalls.

 

[Webbo2]

https://www.merriam-webster.com/dictionary/analogy
You do know bicycle weight cheating is a fictional physical sports win?

You're The Best Lance!
... was also a fictional, despite even physical, win.
... because the win was due to doping instead of training.

But that wasn't the point here in this topic, the point is that they went that far in it, that they put Safety at risk.
That's a No, no?

And the reason why: https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472
https://weightweenies.starbike.com/forum/viewtopic.php?t=176295&start=60

Have you ever ridden a bike race.
When I raced and got beaten I never put it down to folk have better and or lighter although some did. I put down to them being fitter, stronger and or having better race craft.

 

[classic33]

You do know Watership down is fiction as rabbits can’t talk in real life.

It is! They can't!

 

[silva]

Have you ever ridden a bike race.
When I raced and got beaten I never put it down to folk have better and or lighter although some did. I put down to them being fitter, stronger and or having better race craft.

This isn't about who blames who, this is about Shimano making their Light Religion for Cheating in Races the Standard for Every Body.
As Mister Hambini worded on:
https://www.hambini.com/shimano-crankset-failures-an-engineering-analysis/

The failed crankset that this analysis concerns is a Dura Ace 9100 unit. 175mm cranks. Approximately 3.5 years old. The failure occurred in someone with the power output of a shrimp.

HollowTech 2's 2 pieces were pushed into more pieces by Old McDonald Has A Farm, E-I-E-I-O, like happened to the topicstarter here, only on yet another place on the part.
And why - according to:
https://weightweenies.starbike.com/forum/viewtopic.php?t=176295&start=60
... because they use cheap forging methods, and glue, despite their price their bicycle product 7-8 times higher per gramme material than Rays car wheel rims:
https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472
... on some minutes driving distance from them.
... Shimano sacrified Safety for every1, just to win a sec a mile for just racers.
... due to decisions towards cheapskate production
... yet tag a price that is 7-8 times Rays'.
The spindle section of the drivetrain part: as earlier in this thread online-calculated https://www.cyclechat.net/threads/snapped-spindle.309571/post-7572484
20 grammes more into the spindles wall would make it 29% better withstanding the torsion force from the left side. The "Angle of twist" is that % lower = less deformation.
https://www.ptsmake.com/the-complet...does_metal_fatigue_occur_below_yield_strength

For materials like steel, if we design a component so that its operating stresses are always below the endurance limit, it can theoretically last forever. This is the foundation of ‘infinite life’ design. In past projects at PTSMAKE, understanding this distinction is key. For a steel part on industrial machinery, we aim for infinite life. The fatigue strength coefficient2 helps us model this behavior accurately. For an aluminum aircraft part, the design must account for a finite lifespan and regular inspections.

The S-N curve maps stress to a material’s cycle life. Its most important feature for many metals is the endurance limit. This limit is the key to designing components that can withstand cyclic loading indefinitely, preventing long-term metal fatigue.

... if that 29% less deformation would bring it under the endurance limit of the steel wall of the spindle, metal fatigue would not occur, no crack initiation, and ofc also not growing until Shimano Spindle Snap Story Day.

 

[classic33]

horseshoe crab blood
agarwood
tritium
ZOLGENSMA® (onasemnogene abeparvovec-xioi)
saffron
diamonds
Deathstalker Scorpion venom
painite
Californium
antimatter
Hollowtech2 chainset bargain at £399, and fit for purpose. You are overpaying for 'your' chainset @silva or using a usurious exchange rate.

Features​

• A top-of-the-range 12-speed chainset offering the optimum balance of low weight and rigidity
• HollowTech II hollow aluminium crank arms increase stiffness and strength while reducing mass
• Hollow outer chainring, grants improvements in rigidity for better shifting while saving weight
• The chainring teeth are optimised for better efficiency when used with a 12-speed chain*
• HollowTech II 24mm diameter spindle increases stiffness and efficiency
• The spindle is designed to work seamlessly with HollowTech II bottom brackets (available separately)
• Manufacturer claimed weight: 714 grams (175mm length, 54-40T), 692 grams (175mm length, 52-36T), 685 grams (175mm length, 50-34T)

*He doesn't like teeth on his chainrings, grinds them down. Thereby saving weight.
And uses motorcycle chains not the correct chain as described.

 

[classic33]

This isn't about who blames who, this is about Shimano making their Light Religion for Cheating in Races the Standard for Every Body.
As Mister Hambini worded on:
https://www.hambini.com/shimano-crankset-failures-an-engineering-analysis/

HollowTech 2's 2 pieces were pushed into more pieces by Old McDonald Has A Farm, E-I-E-I-O, like happened to the topicstarter here, only on yet another place on the part.
And why - according to:
https://weightweenies.starbike.com/forum/viewtopic.php?t=176295&start=60
... because they use cheap forging methods, and glue, despite their price their bicycle product 7-8 times higher per gramme material than Rays car wheel rims:
https://www.cyclechat.net/threads/snapped-spindle.309571/post-7602472
... on some minutes driving distance from them.
... Shimano sacrified Safety for every1, just to win a sec a mile for just racers.
... due to decisions towards cheapskate production
... yet tag a price that is 7-8 times Rays'.
The spindle section of the drivetrain part: as earlier in this thread online-calculated https://www.cyclechat.net/threads/snapped-spindle.309571/post-7572484
20 grammes more into the spindles wall would make it 29% better withstanding the torsion force from the left side. The "Angle of twist" is that % lower = less deformation.
https://www.ptsmake.com/the-complet...does_metal_fatigue_occur_below_yield_strength

... if that 29% less deformation would bring it under the endurance limit of the steel wall of the spindle, metal fatigue would not occur, no crack initiation, and ofc* also not growing until Shimano Spindle Snap Story Day.

*Keep on wondering why you keep on mentioning this. You've used it a few times now.
Orbitofrontal Cortex

 

[silva]

*He doesn't like teeth on his chainrings, grinds them down. Thereby saving weight.
And uses motorcycle chains not the correct chain as described.

As tests for the future, some months ago I grinded teeth from a new chainring and new cog towards wider valleys and lower heights, so that it takes longer (or happens never), to be grinded by the chains rollers towards sharkfin shapes, that they need to overcome / rolling over longer trajectories upon every disengagement, resulting in extra wear, and aggravation of it, if you do nothing.
I did something in the past: I first flipped them on their mount, later on I just grinded off beginning hooks of the sharkfins.
Until the chainring / cog ceased to wear further during a chain lifetime (its tensioner range).

That's how my chainring held out since start 2019, and I now reuse the rear cog that the bicycle was delivered with, back in 2017.
I had replaced it, fearing problems. But since the chainring held out, and after a quarter of its 47T broke off in the middle, no further ones breaking, which is now since 3-4 years, I decided to try the same with the rear cog, a new chain on the bicycles first rear cog, so far with success - the cog so far didn't wear further, with the chain tensioner sitting at about 70% of its range, starting from 35%.

The Plus of it: no chainring cost, no rear cog cost, no replacement work, no flipping work. Just make a next motorcycle chain on length, mount it, tension it, and good for another go.
Btw, the motorcycle type 420 chain:

... has twice the internal width of a default bicycle 1/8" singlespeed chain, thus so the rollers. It ADDS weight.
The win is in lifetime: bigger mating surfaces to spread wear over, resulting in slower increase in length = longer life.
About your "not correct", if there is no problem to mount it, and nothing sits in its way, so No Problems, then I'd say it's as correct as: